Influences of short-term normobaric hypoxic training on metabolic syndrome-related markers

ISRCTN ISRCTN11583600
DOI https://doi.org/10.1186/ISRCTN11583600
Submission date
18/08/2017
Registration date
25/08/2017
Last edited
24/08/2017
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
Hypoxic training involves training while breathing hypoxic (low oxygen) air. Although not commonly used, hypoxic training may be beneficial for people with clinical conditions such as coronary artery (heart) disease and chronic obstructive pulmonary (lung) disease. However, the effects of hypoxic training vary greatly according to the oxygen level, exercise intensity, time and duration, and also vary considerably among individuals. The aim of this study is to examine the effects of hypoxic training on factors related to metabolic syndrome (a combination of diabetes, high blood pressure and obesity).

Who can participate?
Men aged 18 or over

What does the study involve?
Participants are divided into two groups based on their body mass index. Participants in the overweight and normal-weight groups are then randomly allocated into either the hypoxic exercise group (hypoxic overweight and hypoxic normal-weight) or the normoxic exercise group (normoxic overweight and normoxic normal-weight). Participants perform treadmill exercise three days per week for four weeks under either hypoxic (low oxygen) or normoxic (normal oxygen) conditions, for 50 minutes (including 5 minutes warm-up and cool-down periods) after a 30-minute rest period. Markers of metabolic syndrome are measured using blood sampling at the start and the end of the study.

What are the possible benefits and risks of participating?
These results may show that hypoxic training could be useful for improving arterial (blood vessel) stiffness, circulatory system function, body composition and metabolism in adult men.

Where is the study run from?
Gifu University (Japan)

When is the study starting and how long is it expected to run for?
March 2014 to May 2015

Who is funding the study?
University of Ulsan (South Korea)

Who is the main contact?
Dr Sohee Shin

Contact information

Dr Sohee Shin
Public

School of Exercise and Sport Science
University of Ulsan
93 Daehak-ro, Nam-gu
Ulsan
44610
Korea, South

Study information

Study designInterventional randomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Community
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details to request a patient information sheet
Scientific titleInfluences of short-term normobaric hypoxic training on metabolic syndrome-related markers in overweight and normal-weight men: a randomised controlled trial
Study objectivesShort-term normobaric hypoxic training influences metabolic syndrome-related markers in overweight and normal-weight men positively.
Ethics approval(s)Institutional review board of the Gifu University School of Medicine, 06/03/2013, ref: 24-392
Health condition(s) or problem(s) studiedMetabolic syndrome
InterventionForty-one Japanese men were included and were divided into two groups based on their body mass indexes (BMIs): BMI ≥25 or BMI <25. Participants in the overweight and normal-weight groups were randomised into the hypoxic exercise group (hypoxic overweight, HO; hypoxic normal-weight, HN) or the normoxic exercise group (normoxic overweight, NO; normoxic normal-weight, NN). Subjects performed treadmill exercise three days per week for four weeks at an exercise intensity of 60% maximum heart rate (HR), under either normobaric hypoxic or normobaric normoxic conditions, for 50 min (including 5 min warm-up and cool-down periods) after a 30-min rest period. Duration of follow-up: 4 weeks.
Intervention typeOther
Primary outcome measureMetabolic syndrome-related markers, measured using blood sampling at baseline and 1 month
Secondary outcome measuresBody composition, measured using body composition analyzer (TANITA Co., Tokyo, Japan) at baseline and 1 month
Overall study start date30/03/2014
Completion date30/05/2015

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexMale
Target number of participantsPlanned sample size: 40: Japanese sample size: 40
Key inclusion criteria1. All patients admitted to one of the participating wards
2. Aged 18 years or over
3. Able to provide informed consent to participate
Key exclusion criteria1. Coronary heart disease
2. Cardiac insufficiency
3. Pulmonary disease
4. Uncontrolled hypertension
Date of first enrolment30/03/2014
Date of final enrolment30/08/2014

Locations

Countries of recruitment

  • Japan

Study participating centre

Gifu University
501-1194

Sponsor information

University of Ulsan
University/education

93 Daehak-ro, Nam-gu
Ulsan
44610
Korea, South

Website http://www.ulsan.ac.kr/
ROR logo "ROR" https://ror.org/02c2f8975

Funders

Funder type

University/education

University of Ulsan
Private sector organisation / Universities (academic only)
Alternative name(s)
UOU
Location
Korea, South

Results and Publications

Intention to publish date01/11/2017
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planPlanned publication in a high-impact peer reviewed journal.
IPD sharing planThe datasets generated during and/or analysed during the current study are/will be available upon request from Dr Sohee Shin.